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Journal of Patient-Reported Outcomes

Table 1 Participant characteristics

From: Test–retest reliability of the FitMáx©-questionnaire in a clinical and healthy population

Variable

Pulmonary patients

Oncology patients

Cardiac patients

Healthy subjects

Total population

n

32

41

28

26

127

Anthropometrical data

     

Gender

     

 Male

15 (46.9%)

27 (65.9%)

21 (75.0%)

21 (80.8%)

84 (66.1%)

 Female

17 (53.1%)

14 (34.1%)

7 (25.0%)

5 (19.2%)

43 (33.9%)

Age (years)

64 (53–72)

62 (51–73)

64 (57–70)

49 (38–60)

62 (49–70)

Height (cm)

170 (161–178)

175 (169–183)

175 (171–180)

179 (173–183)

175 (168–182)

Weight (kg)

79 (71–91)

81 (71–91)

80 (72–93)

73 (68–81)

79.2 (69.7–90.2)

BMI (kg/m)

27.6 (24.3–30.5)

26.4 (22.8–29.5)

26.1 (23.5–28.7)

23.0 (22.0–25.0)

25.3 (23.0–28.5)

COPD, GOLD classification

     

 None

25 (78.1%)

39 (95.1%)

27 (96.4%)

26 (100.0%)

117 (92.1%)

 GOLD I

3 (9.4%)

0 (0.0%)

1 (3.6%)

0 (0.0%)

4 (3.1%)

 GOLD II

3 (9.4%)

2 (4.9%)

0 (0.0%)

0 (0.0%)

5 (3.9%)

 GOLD III

1 (3.1%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

1 (0.8%)

 GOLD IV

0 (0.0%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

Use of β-blocker

     

 Yes, n (%)

7 (21.9%)

4 (9.8%)

12 (42.9%)

26 (100.0%)

23 (18.1%)

 No, n (%)

25 (78.1%)

37 (90.2%)

16 (57.1%)

0 (0.0%)

104 (81.9%)

CPET data

     

FEV1 (L)

2.22 (1.83–3.24)

*

3.35 (2.71–3.84)

†

3.72 (2.79–4.83)‡

FVC (L)

3.10 (2.61–4.08)

*

4.14 (3.67–4.92)

†

2.95 (2.12–3.76)‡

Maximal workload (W)

106 (76–181)

*

173 (144–274)

†

143 (94–227.5)‡

VO2peak (ml/kg/min)

17.47 (15.91–27.81)

*

24.92 (20.80–40.23)

†

21.94 (16.89–31.29)‡

HRpeak (beat/min)

142 (129–158)

*

153 (124–172)

†

148 (126–164) ‡

RER (VCO2/VO2)

1.08 (0.98–1.13)

*

1.12 (1.07–1.21)

†

1.10 (1.02–1.16)‡

VO2peak reference^ (ml/kg/min)

26.76 (20.20–32.52)

30.25 (25.32–35.12)

32.86 (26.78–35.94)

40.16 (36.10–45.50)

32.53 (25.32–38.05)

% of the reference VO2peak

83.0 (66.8–107.2)

*

89.6 (73.3–117.1)

†

94.1 (85.7–134.5)‡

  1. Results are displayed as n (%) and as median (IQR)
  2. Missing information, number of subjects: FEV1, 1; FVC, 1
  3. cm centimetres, COPD chronic obstructive pulmonary disease, CPET cardiopulmonary exercise testing, FEV1 forced expiratory volume in 1s, FVC forced vital capacity, GOLD Global initiative for chronic obstructive lung disease, HR heartrate, kg kilograms, kg/m2 kilograms per square meter, L litres, min minutes, ml millilitres, n number of subjects, RER respiratory exchange ratio, T0 baseline measurement, T1 second measurement, VO2peak peak oxygen uptake, W watts
  4. *Oncology patients did not perform a CPET
  5. †Most subjects (unknown number) in the healthy population performed a CPET with a viral filter during the COVID-19 period, resulting in unreliable CPET/spirometry parameters. To prevent confusion, we chose to omit these variables
  6. ‡Oncology patients excluded. Moreover, most subjects (unknown number) in the healthy population performed a CPET with a viral filter during the COVID-19 period, resulting in unreliable CPET parameters. Given this inaccuracy, the total group for this variable is only based on pulmonary and cardiac patients
  7. ^The prediction model for VO2peak of the LowLands Fitness Registry was used as a reference value [20]
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